/* ─────────────────────────────────────────────────────────────
   OPTIMUS / MECHANICA — 暗色工程图鉴界面
   ───────────────────────────────────────────────────────────── */
:root{
  --bg:#070d18;
  --panel:rgba(10,18,32,.84);
  --line:rgba(126,166,214,.14);
  --line-2:rgba(126,166,214,.08);
  --txt:#e9f0f8;
  --muted:#8497b0;
  --dim:#5c6e87;
  --accent:#ff5838;
  --accent-2:#5ec8ff;
  --amber:#ffb14a;
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  --sans:"Helvetica Neue",Helvetica,Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;height:100%;overflow:hidden;background:var(--bg);color:var(--txt);font-family:var(--sans);-webkit-font-smoothing:antialiased}
button,select,input{font-family:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
.hidden{display:none !important}
::selection{background:rgba(255,88,56,.34)}

#app{height:100vh;display:flex;flex-direction:column;min-width:980px}

/* ── 顶栏 ───────────────────────────────────────────── */
.topbar{height:58px;flex:0 0 58px;display:flex;align-items:center;justify-content:space-between;padding:0 26px;border-bottom:1px solid var(--line);background:rgba(6,11,20,.72);backdrop-filter:blur(12px);z-index:20}
.brand{display:flex;align-items:center;gap:16px}
.mark{font-family:var(--mono);font-size:19px;font-weight:700;letter-spacing:-.06em;color:var(--txt);border:1px solid rgba(233,240,248,.32);padding:4px 9px 5px;line-height:1}
.brand-name{font-size:12px;letter-spacing:.24em;font-weight:600;color:#cdd9e8}
.brand-name i{color:var(--accent);font-style:normal;margin:0 4px}
.topbar-right{display:flex;align-items:center;gap:18px;font-size:10px;letter-spacing:.2em;color:var(--muted);font-family:var(--mono)}
.live{display:flex;align-items:center;gap:9px;color:#a8bad0}
.live i{width:5px;height:5px;border-radius:50%;background:var(--accent);box-shadow:0 0 9px var(--accent);animation:blink 2.4s infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.35}}
.vline{width:1px;height:16px;background:var(--line)}
#figNum{color:var(--accent-2)}

/* ── 三栏工作区 ─────────────────────────────────────── */
.workspace{flex:1;min-height:0;display:grid;grid-template-columns:326px minmax(0,1fr) 296px}
.panel{position:relative;min-height:0;overflow-y:auto;overflow-x:hidden;background:var(--panel);scrollbar-width:thin;scrollbar-color:rgba(120,160,210,.25) transparent}
.panel::-webkit-scrollbar{width:4px}
.panel::-webkit-scrollbar-thumb{background:rgba(120,160,210,.25)}
.panel.left{border-right:1px solid var(--line);padding:38px 28px 20px;display:flex;flex-direction:column}
.panel.right{border-left:1px solid var(--line);padding:24px 20px 16px;display:flex;flex-direction:column;gap:16px}

.eyebrow{font-family:var(--mono);font-size:9.5px;letter-spacing:.2em;color:var(--accent);display:flex;align-items:center;gap:9px;white-space:nowrap}
.dash{width:20px;height:1px;background:var(--accent);display:inline-block}
h1{font-size:47px;line-height:1.13;letter-spacing:-.035em;margin:26px 0 20px;font-weight:800;color:#f2f6fb;text-shadow:0 2px 30px rgba(90,150,220,.14)}
h1 em{color:var(--accent);font-style:normal}
.lede{font-size:13px;line-height:2.0;color:#9db0c7;margin:0 0 26px;letter-spacing:.02em}
.lede b{color:#d8e4f1;font-weight:600}
.cta-row{display:flex;flex-direction:column;gap:10px;align-items:flex-start}
.btn{display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:600;letter-spacing:.06em;transition:.22s ease}
.btn.primary{background:var(--accent);color:#fff;padding:13px 16px;min-width:188px;justify-content:space-between;box-shadow:0 8px 28px rgba(255,88,56,.26);border-radius:2px}
.btn.primary:hover{background:#ff6b4d;transform:translateY(-2px);box-shadow:0 12px 34px rgba(255,88,56,.38)}
.btn.primary .ico{font-size:10px}
.btn.primary .arrow{font-size:15px;opacity:.8}
.btn.ghost{color:#c3d2e4;padding:8px 2px;font-size:12px}
.btn.ghost:hover{color:var(--accent-2)}
.btn.ghost span{color:var(--accent);margin-left:4px}
.rule{height:1px;background:var(--line);margin:28px 0 22px}
.mini-label{font-family:var(--mono);font-size:9px;letter-spacing:.2em;color:var(--dim);margin-bottom:12px}
.left-note p{font-size:11.5px;line-height:1.95;color:#879bb4;margin:0 0 16px}
.left-note p b{color:var(--accent-2);font-weight:600}
.checks{display:grid;grid-template-columns:1fr 1fr;gap:8px 6px;margin-bottom:18px}
.checks span{font-size:10px;color:#7f94ae;white-space:nowrap}
.checks span::first-letter{color:var(--accent-2)}
.link{font-size:11px;color:var(--accent-2);padding:0;letter-spacing:.04em;border-bottom:1px solid rgba(94,200,255,.3);padding-bottom:3px}
.link:hover{color:#fff;border-color:#fff}
.link span{margin-left:6px}
.left-bottom{margin-top:auto;padding-top:24px;display:flex;justify-content:space-between;font-family:var(--mono);font-size:9px;letter-spacing:.16em;color:#4d5f77;border-top:1px solid var(--line-2)}

/* ── 中央视口 ───────────────────────────────────────── */
.viewport{position:relative;min-width:0;overflow:hidden;background:#0a1220}
#gl{position:absolute;inset:0;width:100%;height:100%;display:block;outline:none;cursor:grab}
#gl:active{cursor:grabbing}
.vp-vignette{position:absolute;inset:0;pointer-events:none;background:radial-gradient(ellipse at 50% 46%,transparent 42%,rgba(4,8,16,.42) 100%)}
.corner{position:absolute;width:18px;height:18px;pointer-events:none;border-color:rgba(140,185,230,.35);border-style:solid;border-width:0}
.corner.tl{top:16px;left:16px;border-top-width:1px;border-left-width:1px}
.corner.tr{top:16px;right:16px;border-top-width:1px;border-right-width:1px}
.corner.bl{bottom:16px;left:16px;border-bottom-width:1px;border-left-width:1px}
.corner.br{bottom:16px;right:16px;border-bottom-width:1px;border-right-width:1px}
.vp-top{position:absolute;top:22px;left:36px;right:36px;display:flex;justify-content:space-between;pointer-events:none;font-family:var(--mono);font-size:9.5px;letter-spacing:.18em;color:#8ea6c2}
#modeTag{color:var(--accent-2)}
.crosshair{position:absolute;top:50%;left:50%;width:26px;height:26px;transform:translate(-50%,-50%);opacity:.16;pointer-events:none}
.crosshair i{position:absolute;background:#a8cdf0}
.crosshair i:first-child{width:100%;height:1px;top:50%}
.crosshair i:last-child{height:100%;width:1px;left:50%}
.vp-badge{position:absolute;left:36px;bottom:34px;display:flex;align-items:center;gap:10px;padding:9px 14px;border:1px solid var(--line);background:rgba(8,15,27,.76);backdrop-filter:blur(8px);font-family:var(--mono);font-size:10px;letter-spacing:.16em;color:#c2d3e6}
.vp-badge b{color:var(--accent-2);font-size:11px;margin-left:10px;font-weight:600}
.led{width:6px;height:6px;border-radius:50%;background:var(--accent-2);box-shadow:0 0 8px var(--accent-2)}
.led.busy{background:var(--accent);box-shadow:0 0 8px var(--accent)}
.vp-hint{position:absolute;left:50%;bottom:38px;transform:translateX(-50%);font-size:10.5px;letter-spacing:.14em;color:#6f849e;pointer-events:none;white-space:nowrap}
.vp-hint i{color:var(--accent);font-style:normal;margin:0 5px}
.view-buttons{position:absolute;right:32px;bottom:30px;display:flex;gap:4px}
.view-buttons button{font-size:10px;letter-spacing:.1em;padding:7px 9px;color:#8ba1ba;border:1px solid var(--line);background:rgba(8,15,27,.7);transition:.18s}
.view-buttons button:hover{color:#fff;border-color:rgba(94,200,255,.5)}
.view-buttons button.on{color:#fff;background:rgba(94,200,255,.14);border-color:rgba(94,200,255,.55)}
.focus-bar{position:absolute;top:52px;left:50%;transform:translateX(-50%);display:flex;align-items:center;gap:14px;padding:8px 12px 8px 14px;background:rgba(255,88,56,.12);border:1px solid rgba(255,88,56,.42);font-size:11px;letter-spacing:.08em;color:#ffd9cf;backdrop-filter:blur(8px)}
.focus-bar button{font-size:10px;color:var(--accent);border-left:1px solid rgba(255,88,56,.35);padding-left:12px}
.focus-bar button:hover{color:#fff}
.part-card{position:absolute;left:36px;top:64px;width:250px;padding:14px 16px;background:rgba(8,15,27,.9);border:1px solid rgba(94,200,255,.32);border-left:2px solid var(--accent-2);backdrop-filter:blur(10px);pointer-events:none}
.pc-kicker{font-family:var(--mono);font-size:9px;letter-spacing:.18em;color:var(--accent-2);margin-bottom:8px}
.pc-title{font-size:15px;font-weight:700;margin-bottom:8px}
.pc-desc{font-size:11px;line-height:1.8;color:#93a8c0}
.tooltip{position:absolute;pointer-events:none;padding:7px 10px;background:rgba(6,12,22,.94);border:1px solid rgba(94,200,255,.38);font-size:11px;letter-spacing:.04em;color:#dbeaf8;white-space:nowrap;z-index:8;transform:translate(12px,-50%)}
.tooltip small{display:block;color:var(--accent-2);font-family:var(--mono);font-size:8.5px;letter-spacing:.16em;margin-top:3px}

/* ── 右栏 ───────────────────────────────────────────── */
.sec-head{display:flex;justify-content:space-between;align-items:center;font-family:var(--mono);font-size:9.5px;letter-spacing:.18em;color:#9db2ca;padding-bottom:10px;border-bottom:1px solid var(--line)}
.sec-head span:last-child{color:var(--accent)}
.sec-head.sm{font-size:9px;color:var(--dim);padding-bottom:8px}
.mech-list{display:flex;flex-direction:column;gap:1px}
.mech-item{display:flex;align-items:center;gap:12px;padding:10px 9px;text-align:left;border-left:2px solid transparent;transition:.18s;color:#8fa4bd}
.mech-item:hover{background:rgba(94,200,255,.06);color:#dce8f5}
.mech-item.on{background:rgba(255,88,56,.09);border-left-color:var(--accent);color:#fff}
.mech-item .num{font-family:var(--mono);font-size:10px;color:var(--dim);letter-spacing:.08em}
.mech-item.on .num{color:var(--accent)}
.mech-item .nm{font-size:11.5px;letter-spacing:.05em;flex:1}
.mech-item .en{font-family:var(--mono);font-size:8px;letter-spacing:.06em;color:#5f7590;white-space:nowrap}
.mech-item.on .en{color:#c58a7a}
.mech-card{padding:15px 14px 16px;border:1px solid var(--line);background:linear-gradient(160deg,rgba(255,88,56,.055),rgba(10,18,32,.2))}
.mc-head{display:flex;gap:10px;align-items:center;font-family:var(--mono);font-size:9px;letter-spacing:.14em;color:var(--accent)}
.mc-head span:first-child{border:1px solid rgba(255,88,56,.5);padding:2px 5px}
.mc-head span:last-child{color:#9aabc0}
.mech-card h3{font-size:19px;line-height:1.42;letter-spacing:-.01em;margin:14px 0 10px;font-weight:700}
.mech-card p{font-size:11px;line-height:1.9;color:#93a7bf;margin:0}
.mc-rule{height:1px;background:var(--line);margin:12px 0}
.mech-card p.mc-detail{font-size:10.5px;color:#6f839c}
.tools{display:flex;flex-direction:column;gap:10px}
.tool-grid{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.tool-grid button{display:flex;align-items:center;gap:7px;font-size:10.5px;letter-spacing:.04em;padding:9px 8px;color:#8ea3bc;border:1px solid var(--line);background:rgba(12,22,38,.5);transition:.18s}
.tool-grid button:hover{border-color:rgba(94,200,255,.45);color:#dceaf7}
.tool-grid button.on{background:rgba(94,200,255,.13);border-color:rgba(94,200,255,.5);color:#fff}
.bullet{width:5px;height:5px;border:1px solid currentColor;border-radius:50%;flex:0 0 auto}
.tool-grid button.on .bullet{background:var(--accent-2);border-color:var(--accent-2);box-shadow:0 0 7px var(--accent-2)}
.slider-row{display:flex;align-items:center;gap:10px;font-size:10.5px;color:#8ea3bc;letter-spacing:.05em}
.slider-row span{white-space:nowrap}
.slider-row b{font-family:var(--mono);font-size:10px;color:var(--accent-2);width:24px;text-align:right}
input[type=range]{-webkit-appearance:none;appearance:none;background:transparent;cursor:pointer;flex:1;height:18px;margin:0}
input[type=range]::-webkit-slider-runnable-track{height:2px;background:rgba(126,166,214,.26)}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:10px;height:10px;background:var(--accent-2);border-radius:50%;margin-top:-4px;box-shadow:0 0 8px rgba(94,200,255,.7)}
input[type=range]::-moz-range-track{height:2px;background:rgba(126,166,214,.26)}
input[type=range]::-moz-range-thumb{width:10px;height:10px;background:var(--accent-2);border:0;border-radius:50%}
.stats{margin-top:auto;display:grid;grid-template-columns:repeat(3,1fr);gap:4px;border-top:1px solid var(--line);padding-top:14px}
.stats div{display:flex;flex-direction:column;gap:4px}
.stats b{font-family:var(--mono);font-size:17px;color:#e6f0fa;font-weight:500}
.stats span{font-size:9px;letter-spacing:.08em;color:#63778f}

/* ── 时间轴 ─────────────────────────────────────────── */
.timeline{flex:0 0 118px;border-top:1px solid var(--line);background:rgba(7,13,24,.92);padding:14px 26px 12px;z-index:10}
.tl-head{display:flex;justify-content:space-between;align-items:center;font-family:var(--mono);font-size:9.5px;letter-spacing:.2em;color:#9db2ca;margin-bottom:14px}
.tl-head em{font-style:normal;color:#5f7590;letter-spacing:.08em}
.tl-head .sq{display:inline-block;width:6px;height:6px;background:var(--accent);margin-right:9px;vertical-align:middle}
#timeCode{color:var(--accent-2);font-size:11px}
.tl-main{display:flex;align-items:flex-start;gap:18px}
.play{width:34px;height:34px;flex:0 0 34px;border:1px solid rgba(255,88,56,.55);background:rgba(255,88,56,.13);color:var(--accent);font-size:12px;border-radius:2px;transition:.18s}
.play:hover{background:var(--accent);color:#fff}
.track-wrap{position:relative;flex:1;padding-top:2px}
.phase-bar{position:absolute;top:0;left:0;right:0;height:5px;display:flex;gap:2px}
.phase-seg{height:5px;background:rgba(126,166,214,.16);cursor:pointer;transition:.18s;position:relative}
.phase-seg:hover{background:rgba(94,200,255,.4)}
.phase-seg.on{background:rgba(255,88,56,.72)}
#scrub{width:100%;display:block;height:18px;margin:8px 0 0;position:relative;z-index:2}
#scrub::-webkit-slider-runnable-track{height:3px;background:linear-gradient(90deg,var(--accent) 0%,var(--accent) var(--p,0%),rgba(126,166,214,.2) var(--p,0%),rgba(126,166,214,.2) 100%)}
#scrub::-moz-range-track{height:3px;background:rgba(126,166,214,.2)}
#scrub::-webkit-slider-thumb{width:13px;height:13px;margin-top:-5px;background:#fff;border:3px solid var(--accent);box-shadow:0 0 10px rgba(255,88,56,.8)}
#scrub::-moz-range-thumb{width:9px;height:9px;background:#fff;border:3px solid var(--accent);border-radius:50%}
.ticks{display:flex;justify-content:space-between;margin-top:7px;font-family:var(--mono);font-size:8.5px;letter-spacing:.08em;color:#5a6d85}
.ticks span{position:relative;padding-top:7px}
.ticks span::before{content:"";position:absolute;top:0;left:50%;width:1px;height:4px;background:rgba(126,166,214,.3)}
.tl-actions{display:flex;gap:6px;align-items:center;padding-top:2px}
.tl-actions button,.tl-actions select{height:30px;min-width:34px;padding:0 8px;border:1px solid var(--line);background:rgba(12,22,38,.6);color:#8ea3bc;font-size:12px;transition:.18s}
.tl-actions button:hover,.tl-actions select:hover{color:#fff;border-color:rgba(94,200,255,.45)}
.tl-actions button.on{color:var(--accent-2);border-color:rgba(94,200,255,.5)}
.tl-actions select{font-size:10px;font-family:var(--mono);outline:none}

/* ── 规格弹窗 ───────────────────────────────────────── */
.modal{position:fixed;inset:0;z-index:60;background:rgba(3,7,14,.78);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;padding:28px}
.modal-card{position:relative;width:min(720px,92vw);max-height:88vh;overflow:auto;background:#0c1626;border:1px solid rgba(126,166,214,.25);padding:38px 42px;box-shadow:0 30px 90px rgba(0,0,0,.6)}
.modal-close{position:absolute;top:16px;right:18px;font-size:16px;color:#8ea3bc}
.modal-close:hover{color:#fff}
.modal-card h2{font-size:30px;letter-spacing:-.02em;margin:18px 0 12px}
.modal-lede{font-size:12.5px;line-height:1.9;color:#93a7bf;margin:0 0 24px}
.spec-table{border-top:1px solid var(--line)}
.spec-table div{display:grid;grid-template-columns:118px 1fr;gap:16px;padding:11px 0;border-bottom:1px solid var(--line-2);font-size:11.5px;line-height:1.7}
.spec-table span{color:var(--accent-2);font-family:var(--mono);font-size:10px;letter-spacing:.1em}
.spec-table b{font-weight:400;color:#b9cade}
.keys{margin-top:26px}
.key-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:10px 12px;font-size:10.5px;color:#93a7bf}
kbd{font-family:var(--mono);font-size:9.5px;border:1px solid rgba(126,166,214,.35);padding:2px 5px;margin-right:4px;color:#dbe8f5;background:rgba(126,166,214,.08)}

@media (max-width:1280px){
  .workspace{grid-template-columns:280px minmax(0,1fr) 262px}
  .panel.left{padding:28px 20px 16px}
  h1{font-size:39px}
  .lede{font-size:12px}
  .vp-hint{display:none}
}
@media (max-height:760px){
  .panel.left{padding-top:22px}
  h1{font-size:38px;margin:16px 0 12px}
  .lede{margin-bottom:16px;line-height:1.8}
  .rule{margin:18px 0 14px}
  .panel.right{gap:10px}
  .mech-item{padding:7px 8px}
}